BRV Bonetti Rubinetterie Valduggia S.r.l.


Regolare e distribuire energia pulita

°Caleon Thermostat - Wi-Fi

Elegant chrono-thermostat with TFT capacitive touch panel. Wi-Fi N 2.4 Ghz connection for remote control by °Caleon app.

Product file

726 - Basic Series

Anti-scald thermostatic mixing valve for medium and small applications. Compact size. Available Kvs: 1.5, 1.8 and 3.4.

Product file


Full bore 2-way zone ball valve, with bidirectional actuator with quick connection. Dimensions from 1/2" DN15 to 1"1/4 DN32.

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Multifunctional compact hydraulic module for the management of a direct circuit, a mixed circuit and the production of domestic hot water (DHW)

Product file

ModvFresh Basic

Compact heat exchange unit to deliver fresh domestic hot water (DHW).

Product file

DomvS Clima

Control unit for manifolds of heating and cooling radiant panels up to 200 m2. Fixed point thermostatic mixer or motorized rotary mixing valve. LCD room control unit.

Product file

Mixing kit for ModvFresh Basic

35÷60°C thermostatic mixing kit designed for ModvFresh Basic, with anti-scald thermostatic mixing valve for small applications.

Product file


Modular multi-zone distribution box for wall-mounted gas boilers or heat pumps. Three types of available pump units: direct, mixed motorized, mixed fixed point.

Product file

M2 MIX33 - DN25

2-Way pump unit with 3-way mixing valve with built-in by-pass

The unit for 1” (180 mm) circulating pumps consists of:


  • Connection.
  • 3-way mixing valve with adjustable by-pass. Through the by-pass (adjustable from the front part) it is possible to mix on the supply line a quantity of water coming back from the return line of the system.
  • High efficiency synchronous pre-wired circulating pump (for the models that include it).
  • Flanged ball valve supplied with in-handle thermometer (coded red, range 0°C-120°C).


  • Flanged ball valve with non return valve 20 mbar (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (coded blue; 0°C-120°C).
  • “T” Connection for mixing valve.
  • Connection.

Centre distance 125 mm. EPP insulation box (Measurements: 250x380x170 mm).
PN 10, max temperature 110°C (unit without pump).
External connections:  1” Female.

For power up to 38 kW (with Δt 15 K) and maximum flow 2200 l/h.
Kvs Value: 7,0.
Approximate data calculated with a 6 m nominal lifting power circulating pump.
For an accurate measuring or for higher flows, please refer to the curves shown in the technical section.
Available circulating pumps:
Wilo Yonos Para RS 25/6 (Y6)
Grundfos UPM3 Auto L 25-70 (UL7)
Wilo Yonos Para RS 25/7,5 (Y8)

We suggest you to install two isolating valves Art. 552 (see Correlated Articles) before the pump unit to allow an easy service or replacement of the components of the unit.

The By-pass integrated into the 3-way mixing valve ensures a recyling inside the installation, even when the mixing valve is fully open. Through the by-pass, a fixed percent of the mixing can be set, in the case when the flow through the mixing valve is not sufficient.
Therefore, in case of a bad working of the system causing an increase of the temperature of the installation, the recycling through the by-pass allows a decrease in the temperature of the water in the undrefloor installation. This can be done mixing the warm water of the return circuit with the hot water of the supply circuit, reducing possible damages.

M2 MIX33 pump units are supplied with the recycling by-pass fully open.

Approximate data for applications in low and medium temperature heating systems
Δt Approximate power and
flow of the installation
circulating pump
lifting power
Approximate surface of
the underfloor heating system
8 K 17 kW - 1800 l/h Wilo Yonos Para RS 25/6 3 mH2O Up to 100 m2
8 K 20 kW - 2200 l/h Wilo Yonos Para RS 25/7,5 5 mH2O Up to 200 m2
15 K 31 kW - 1800 l/h Wilo Yonos Para RS 25/6 3 mH2O -
15 K 38 kW - 2200 l/h Wilo Yonos Para RS 25/7,58 5 mH2O -

Working principle

During the regular working process, with the mixer completely closed on the recycling for example, a part of the fluid is ispirated from the pump all along the by-pass line. As a result, one has a very high delivered capacity and a reduced temperature.

Adjusting the by-pass
Reference indicator Reference indicator
The By-pass is fully open and it
allows the maximum recycling.
The screwdriver cut is aligned along the reference indicator.
The By-pass is fully closed and there is no recycling.
The screwdriver cut is in an orthogonal position (at 90°) in comparison with the reference indicator.

Servomotor M21: 3 points servomotor for mixing valve. Bidirectional, reversible with fixed limit switches for an operating range of 90°. 230V, 2 min., torque: 5 Nm. IP42.
Several models available: see the section “Servomotors”.

AHC20 servomotor: basic climatic controller with servomotor and outside sensor, with climatic regulation for mixing valve with electronic control to keep fixed the selected temperature of the room. Bidirectional, reversible with fixed limit switches for an operating range of 90°, 2 min., torque: 6 Nm. Power supply 230V. IP42.

CMP25-2 climatic controller: “touch screen” climatic controller with servomotor for mixing valve. Bidirectional, reversible with fixed limit switches for an operating range of 90°. 230V, 2 min., torque: 10 Nm. IP42.

Measuring and check of a DN25 system

  Clicking on the icon at side it is possible to download an Excel file dealing with the measuring and the check of a DN25 pump unit; it is possible to select the model and the working parameters, so getting a check of the power and of the residual lifting power.In case of underfloor heating system the surface that can be managed is approximately calculated. Changing the starting data it is possible to simulate different employment situations and to make your considerations.

M2 MIX33:
Code 1”: 20355R-M33 - with circ. pump: 20355R-M33-(Y6/UL7/Y8)

M2 MIX33 with built-in M21 servomotor:
Code 1”: 20355R-M33-M21 - with circ. pump: 20355R-M33-(Y6/U7/Y8)M21

M2 MIX33 with built-in AHC20 servomotor:
Code 1”: 20355R-M33-AHC - with circ. pump: 20355R-M33-(Y6/U7/Y8)AHC

M2 MIX33 with built-in CMP25-2 climatic controller:
Code 1”: 20355R-M33-CMP - with circ. pump: 20355R-M33-(Y6/U7/Y8)CMP

Note: in units with pre-assembled pump, the pump
Grundfos UPM3 AUTO L 25-70 is identified in the code with U7.

Standard version: right supply.
Left supply version available with extra price: see price list.